Bluetooth: Auto connection and power on

When hdev is closed (e.g. Mgmt power off command, RFKILL or controller
is reset), the ongoing active connections are silently dropped by the
controller (no Disconnection Complete Event is sent to host). For that
reason, the devices that require HCI_AUTO_CONN_ALWAYS are not added to
hdev->pend_le_conns list and they won't auto connect.

So to fix this issue, during hdev closing, we remove all pending LE
connections. After adapter is powered on, we add a pending LE connection
for each HCI_AUTO_CONN_ALWAYS address.

This way, the auto connection mechanism works propely after a power
off and power on sequence as well as RFKILL block/unblock.

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 507a137a584b2445fb23b5865988193336d9bcc6..9470a9c14324b6eaa069a5c5dc67fce742fc7c83 100644 (file)
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -2266,6 +2266,7 @@ static int hci_dev_do_close(struct hci_dev *hdev)
        hci_dev_lock(hdev);
        hci_inquiry_cache_flush(hdev);
        hci_conn_hash_flush(hdev);
+       hci_pend_le_conns_clear(hdev);
        hci_dev_unlock(hdev);
 
        hci_notify(hdev, HCI_DEV_DOWN);

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index a62e22ca73a17d58daf066b103de2eca1b51bc63..f878267ba6ab53d090f5399d0f9b2f65573a3691 100644 (file)
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -4669,6 +4669,17 @@ void mgmt_index_removed(struct hci_dev *hdev)
        mgmt_event(MGMT_EV_INDEX_REMOVED, hdev, NULL, 0, NULL);
 }
 
+/* This function requires the caller holds hdev->lock */
+static void restart_le_auto_conns(struct hci_dev *hdev)
+{
+       struct hci_conn_params *p;
+
+       list_for_each_entry(p, &hdev->le_conn_params, list) {
+               if (p->auto_connect == HCI_AUTO_CONN_ALWAYS)
+                       hci_pend_le_conn_add(hdev, &p->addr, p->addr_type);
+       }
+}
+
 static void powered_complete(struct hci_dev *hdev, u8 status)
 {
        struct cmd_lookup match = { NULL, hdev };
@@ -4677,6 +4688,8 @@ static void powered_complete(struct hci_dev *hdev, u8 status)
 
        hci_dev_lock(hdev);
 
+       restart_le_auto_conns(hdev);
+
        mgmt_pending_foreach(MGMT_OP_SET_POWERED, hdev, settings_rsp, &match);
 
        new_settings(hdev, match.sk);